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Commit 7a09c64b authored by Matthew Ma's avatar Matthew Ma Committed by Greg Kroah-Hartman
Browse files

mmc: core: Fix kernel panic when remove non-standard SDIO card 



commit 9972e6b404884adae9eec7463e30d9b3c9a70b18 upstream.

SDIO tuple is only allocated for standard SDIO card, especially it causes
memory corruption issues when the non-standard SDIO card has removed, which
is because the card device's reference counter does not increase for it at
sdio_init_func(), but all SDIO card device reference counter gets decreased
at sdio_release_func().

Fixes: 6f51be3d ("sdio: allow non-standard SDIO cards")
Signed-off-by: default avatarMatthew Ma <mahongwei@zeku.com>
Reviewed-by: default avatarWeizhao Ouyang <ouyangweizhao@zeku.com>
Reviewed-by: default avatarJohn Wang <wangdayu@zeku.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20221014034951.2300386-1-ouyangweizhao@zeku.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ed7f1ff8

drivers/mmc/core/sdio_bus.c

+2 −1
Original line number Diff line number Diff line
@@ -266,6 +266,7 @@ static void sdio_release_func(struct device *dev) 
{

	struct sdio_func *func = dev_to_sdio_func(dev);



	if (!(func->card->quirks & MMC_QUIRK_NONSTD_SDIO))

		sdio_free_func_cis(func);



	kfree(func->info);